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Author:
Yu-Tuan Lin
GeoGebra
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百分數及其應用
第八周作业2
双心四边形
第三周作业效果演示
撒针估算面积实验
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任何三角形內角和180度(五上數翰4-2)
circle
進步公式
第三冊2-2練習18
三視圖3d眼鏡
Discover Topics
Geometric Transformations
Prism
Difference and Slope
Straight Lines
Cuboid